Cement transporting and placing machine



y 5, 1965 G. P. DUECY 3,185,450

CEMENT TRANSPQRTING AND PLACING MACHINE Filed Oct. 7, 1963 4 Sheets-Sheet 1 GEORGE P. DUECY INVENTOR.

ATTORNEYS y 1965 G. P. DUECY 3,185,450

CEMENT TRANSPORTING AND PLACING MACHINE Filed Oct. 7, 1963 4 Sheets-Sheet 2 GEORGE P. DUECY INVENTOR.

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ATTORNEYS May 25, 1965 s. P. DUECY 3,185,450

I CEMENT TRANSPQRTING AND PLACING MACHINE Filed Oct. '7, 1963 4 Sheets-Sheet a GEORGE P. D UECY INVENTOR.

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A TTORNE Y5 May 25, 1965 N E G. P. DUECY 3,185,450

CEMENT TRANSPORTING AND PLACING MACHINE Filed Oct. '7, 19s: 4 Sheets-Sheet 4 GEORG E P. DUECY INVENTOR.

"MM A ATTORNEY United States Patent() T 3,185,450 CEMENT TRANSPORTING AND PLACING MACHINE George P. Duecy, 6300 Glenwood Ave., Everett, Wash. Filed Oct. 7, 1963, Ser. No. 314,217

11 Claims. (Cl. 259-472) This invention relates to a new, novel and useful machine for transporting and placing concrete. More particularly, does this invention contribute to the art a ma-- chine capable of transporting concrete from a central location to a number of remote or scattered pouring stations or operations, as for prestressed beams and the like, and placing or discharging said concrete with great accuracy and speed.

A long recognized problem in the concrete manufacturing industry has been the need for a means for handling low or dry slump concrete. In short, this is concrete which utilizes a minimum amount of water in the mixing stage. The use of low-water-content concrete mix is desirable from the industry standpoint to minimize shrinkage in the. pours. Furthermore, low water content is desirable because excess water reduces the strength of the concrete paste. However, placing dry slump concrete is a problem with presently known equipment. The

problem is that pouring chutes or :tr'oughs normally associated with the well known mixer trucks very often must convey the concrete at slight angles from the horizontal if the concrete is to be placed at any height. It has been found that the angle of troughs or chutes for dry concrete must be quite sharp in order for the dry concrete to move down the length of said trough or chute.

The ordinary mixer truck with its detachable sections of chute or trough is not only ineflicient from the point of view of being able to place the dry concrete mix outice pouring a prestressed beam, without interruption and with great accuracy and speed.

Hence, it is a feature of this invention to provide a concrete transporting and placing machine which overcomes the problems which have hitherto inhered in the uses of dry slump concrete.

Another feature of this invention is to furnish a concrete transportating and placing machine which, because of its ability to discharge large quantities of concrete accurately and Without interruption, is extremely fast and efficient. v

Still another feature of this invention is to supply a concrete transporting and placing machine which reduces side a small radius of swing of its chute, or above a reawkward in combining its limited pouring ability with restricted mobility.

This invention seeks to overcome the disadvantages and limitations of commonly known equipment by providing a unique combination of elements specifically de-.

signed to handle any kind of concrete mix, particularly low slump or dry concrete paste or mix. In short, this invention comprises a large vehicle chassis for rapidly moving from one location to another. Great flexibility and etficiency stem not only from its vehicular chassis but from a mixer means at the rear of the machine which is readily able to discharge concrete therefrom at whatever rate of flow isdesired. The concrete moves out of the mixer onto a conveyor which positively moves or conveys the concrete from the inner. end of the conveyor up to the outer end thereof. At the end of the conveyor, the concrete drops onto another sharply inclined chute to be placed in the exact desired location. The boom structure on which the conveyor is mounted swings on a vertical axis so that the conveyor can be swung from side to side of the machine around said vertical pivot in an arc in excess of 180. Furthermore, the conveyor boom is pivotable about a horizontal axis permitting the discharge end of the conveyor to be raised to heights substantially above those normally encountered for the placing of concrete. Finally,the outer end of the boom is provided with a chute which is movable around the end of the conveyor in a generally horizontal circular path. Also, the angle of the chute may be varied. In this way concrete may be poured along a considerable length of form in which the rides of the form are close together to define a narrow or small opening as for instance in the time in which sizable quantities of concrete must be placed and transported as quickly as possible to a number of different locations remote from a central supply of concrete mix.

Still another feature of this invention is to provide a concrete transporting and placing machine which minimizes the use of high-water-content concrete mixes and which in fact handles all types of concrete mixes from extremely dry to extremely wet.

A further feature of this invention is to furnish a concrete transporting and placing machine which, because of its abilityto discharge continuously and with accuracy,

reducesattendant labor costs and eliminates awkward, conlventional mixer trucks and other common placing too s.

Another feature of this invention is to supply a con crete transporting and placing'machine which is extremely rugged, versatile and simple in design.

Other features and advantages of this device will be apparent in the following detailed discussion and claims in which the drawings form a part hereof.

\ In the drawings:

FIGURE 1 is a view in perspective, generally taken from a position to its side and toward the front;

FIGURE 2 is a perspective view of the front of the hopper, the hopper gate and chute and the inner portion of the conveyor and conveyor boom;

FIGURE 3 is a view in perspective showing further details of the two-way pivot mounting of the conveyor boom;

FIGURE 4 is a diagrammatic View taken along the line 44 ofFIGURE 3 showing further details of both the horizontal and vertical pivots of the inner end of the conveyor boom;

FIGURE 5 is a rear, partial View taken in a vertical plane through the line 5-5 of FIGURE 2, looking forward from the extreme back end of the conveyor boom structure;

FIGURE 6 is a cross-sectional view through the conveyor showing generally the nature of the belt rollers and their mountings and the general configuration of the belt upon the rollers;

FIGURE 7 is a side elevational view of the outer end of the boom and conveyor showing the conveyor hopper.

and the chute;

FIGURE 8 is a partial view of the conveyor chute which together with FIGURE 7 shows the manner by which the conveyor chute is mounted at the end of the boom;

FIGURE 9 is a diagrammatic plan view taken along the line 1111 of FIGURE 4 to illustrate more clearly the nature of the drive mechanism for the vertical pivot of the conveyor boom;

FIGURE 10 is a partial side view taken along the line 1010 of FIGURE 5 showing further details of the inner end of the conveyor structure; and

FIGURE 11 shows further details of the mounting of the conveyor rollers.

Referring now to the drawings, in which like numerals v.9 refer to like parts throughout, the machine of this invention is generally designated by the number 10. The chassis f the machine has rear wheels 12, front wheel 14 and motor 16. The machine is operated from the operators seat situated to one side of the mixer and at a level approximately the same distance above the ground as the mixer gate. Front wheels 14 of course can be operated from the operator's position as can all the elements of the machine. The chassis 15 has main supporting frame 18 on which are mounted the parts of this machine which make it unique.

The rear portion of the machine is provided with a concrete mixing and/or agitating structure generally designated by the number 20. In the instant device the mixing or agitating device is shown to be a tiltable hopper having mixing paddles 22. It is important to understand at this point that the means 20 into which the concrete mix is deposited need not assume any specific structure or design nor does it have to be tiltable. The primary factor is that it be an equivalent mixing mechanism capable of holding concrete mix and that it be capable of depositing the mix on the belt at a uniform feed rate. In the instant case mixer paddles 22 have a drive motor assembly 24 and drive chain housing 26 at the rear thereof. The mixer is pivotally mounted near its front end in a frame structure 28 which permits the mixer to rest thereon in a full down position but which by the same token permits it to be tilted upwardly about the pivot at its forward end so that the bottom may be moved upwardly at a sharp incline to the horizontal. The mixer 23 is tipped or tilted in this unit by the use of two large hydraulic cylinders (not shown) in which the cylinder housings are attached at the base of the frame structure 30 on the rear side thereof. It will be apparent to those skilled in the art that the mixer 20 need not be tiltable.

At the upper end of the rear diagonal mixer frame support means 28 and the generally vertical support means 30 there is rigidly mounted an inverted U-shaped frame structure 32 which stands above the plane defined by the upper edges of the mixer. The mixer, of course, is open in front and has associated with its opening or mouth the hopper chute 34. A mixer gate 36 is pivotally disposed over said mouth in this unit by virtue of the arms 39 which are pivotally attached to the hopper body as at 37. Those skilled in the art will appreciate that the mixer can be provided with means other than a gate for regulating flow of mix to the belt. It will be seen that the cylinder 40 has piston rod 42 which is pivotally connected to the upper end of the gate, generally in the center thereof, the cylinder being pivotally attached to plate 38 so that the gate 36 can be raised or lowered to open the mouth of the mixer to the extent desired.

The conveyor boom is mounted on the chassis so that the inner end thereof is in a position directly below mixer chute 34 to receive concrete discharged from the mixer. Thus the machine has the boom generally designated by the number 50. The conveyor is an elongated structure having the boom which is essentially a pair of interconnected elongated frame members 52 having upper belt rollers 54 and lower belt rollers 56. The belt 58, being of the continuous type, extends in the conventional manner from the lower end of the boom assembly to the outer end. The lower or inner end of the boom St) is provided with mounting plates 60, said plates having trunnion brackets 62 depending from the bottom edges thereof. A conventional adjustable belt tightening and loosening roller 64, best shown in FIGURES 2, 3 and 10, is installed at the inner end of the boom. Slack roller 64 is also mounted on a conventional sliding or adjusting assembly 66, the details of which are not essential to an understanding of this invention. Suffice it to say that the slack roller 64 rotates about shaft 68 mounted in the slack adjusting device 66. Thus, in well known fashion, slack roller 64 may be adjusted inwardly or outwardly in order to regulate tension in the belt 58.

Also mounted at the inner end of the conveyor boom 50 is a receiving bin 70 which itself generally resembles a three sided hopper device for receiving the concrete from hopper chute 34. Receiving bin 70 is supported so that the sides thereof are supported outwardly and upwardly by side posts 72. In this way means are provided for directing all of the concrete discharging down chute 34 onto the conveyor belt. The receiving bin 79 serves the obvious function of channeling discharging concrete onto belt 58 and preventing loss of mix, some of which would otherwise fall oif the belt.

As can be seen by reference to FIGURES 2, 3, 4 and 5, mounting structure for the inner end of the boom is such as to permit the boom to move not only generally vertically for raising and lowering the outer end but also to swing horizontally from side to side. Chassis 15 has constructed thereon the conveyor mounting saddle generally designated by the number 76. Mounting saddle 76 consists of a heavy, vertical shaft means 78 extending from below to above the chassis 15. Said shaft 78 has on the upper end thereof a horizontally disposed saddle base 80 with upstanding side plates at each end thereof. Holes are provided in both the depending trunnion brackets 62 and the upstanding saddle side plates 82, to receive the trunnion shaft 84 on which the vertical swing of the conveyor boom is accomplished.

Pivoting the conveyor boom about vertical shaft 78 is achieved by use of a sprocket wheel 86 securely attached near the lower end of vertical shaft 78. A chain 88 extends around the sprocket wheel and generally rearwardly so that each end of the chain is attached to the piston 90 of a cylinder 92. It will be obvious to those skilled in the art that other means could be provided for turning shaft '78 to thereby swing the boom. The hydraulically-actuated chain and sprocket means shown is merely illustrative of one type of driving means that can be conveniently employed. Up and down or vertical movement of the outer end of the conveyor boom 50 is accomplished around trunnion shaft 84 by brackets 96 attached to the upper side of the boom frame members 52 approximately midway between the inner and outer ends of said conveyor boom. To the upstanding brackets 96 is'attached a Y-shaped yoke 98 which in turn is attached to a piston 100 of a cylinder 102. The rear end of the cylinder 102 is provided with a simple, universal type connection on the upper span of the frame member 32. The conveyor belt, for purposes of illustration, may be driven by a hydraulic motor 106 mounted preferably toward the outer end of the conveyor boom on one of the frame members 52.

The outer end of the boom 50 is provided with a generally round or circular guide hopper 110. Said guide hopper 110 is disposed around the end of the boom in such a manner that the belt 58 in travelling around the end roller terminates over said hopper 110. In this way, cement moving along the belt will fall off the belt and through the hopper. Hopper 110, of course, is fixed to the boom. A rotatable discharge chute 112 is attached to the lower portion of the guide hopper 110. Note especially FIGURES 7 and 8 for suggesting one way by which said discharge chute 112 may be secured to a circular hopper 110. The sliding attachment, for purposes of illustration, is shown to be a ring 114 mounted between two outwardly projecting spaced annular track members 116. Attached at diametrically opposed points on the ring 114 are outwardly and downwardly extending support brackets 118. The upper end of the discharge chute is provided with upper mounting ears which have holes therein designed to align with holes in the brackets 118. In this way, stub shafts or bolts 122 may be inserted through the aligned holes, brackets 118 and ears 120 to allow for a pivotal connection around said shafts or bolts 122 which are essentially coaxially aligned. Vertical movement of the discharge chute 112 may be realized by use of two lower ears 124 attached to the side edges of the lower portion of said chute. A rod 126 is connected between the ears 124 and a pivotal connection as at 125 generally midway between the ears of said rod 126 is made with a piston 128 of cylinder 130 which is pivotally connected at its rear end to a bracket 132. In this way, it will be seen that the ring 114 on the lower portion of circular hopper 110 provides the primary support means for the discharge chute 112. Cylinder 130 is conventionally operated in order to vary the angle of the chute for placing the concrete in the desired position.

Rotation of ring 114 and discharge chute 112 is realized by a pair of side cylinders 136 having pistons 138 with pulley means 140 secured to the outer ends of said positions. Cylinders 136 are mounted one to each side of the boom in a pivotal manner as at 142 on means attached to the frame members 52. Intermediate support means for each cylinder 136 is provided by the hanger member 144. A cable means 139 is attached to the ring member 114 and arranged so that by actuation of either of the two cylinders 136 moves a piston 138 which in turn moves said cable 139. Thus, ring 114 is caused to rotate in a generally horizontal plane between its guide track members 116.

FIGURE 11 shows in slightly greater detail the nature of the mounting of the spring-type rollers 54 which carry the belt 58. Note that spaced mounting clips 150 are rigidly secured to frame member 52. A shift member 152 is inserted between the clips 150 and through a journal member 154 also between clips 150. Journal member, 154 carries a shaft 156 which in turn is attached to the flexible spring roller 54. Another convenient element is provided in the form of a standard 160 constructed on the forward end of the machine for holding the conveyor boom when itis not in use; i The standard 160 is essentially two upstanding frame members having a cross bar connection at the upper end thereof on which the frame members of the boom will rest when the machine is idle.

While the elements of this invention may be driven by mechanical, electrical, air or hydraulic means, it has been found that hydraulic pressure is very conveniently utilized. In this Way, the chassis would have oil reservoirs 162 which supply the hydraulic fluid to hydraulic pump means driven by motor 16. The chassis will. also be provided, of course, with a gas tank 164 for supplying fuel to the motor 16, and water tank 116 withappropriate attachments for washing down the machine after it has been used. It has been found that it is convenient to drive the wheels of the chassis by hydraulic power as well as the various power supply sources for the other features of the machine.

The foregoing is considered as illustrative only of the principles of this invention. Since numerous modifications and changes will occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described. Accordingly all suitable modifications and equivalents may be resorted.

to falling within the scope of the invention.

What is claimed is: t

1. A concrete transporting and placing macine, comprising: (a) a mobile mounting structure including a power plant, (b) a mixer means mounted at one end of said structure, said mixer means having a discharge opening at its inner end and a gate means for opening and closing said discharge opening,1(c) a swingable and remotely controlled elongated boom frame structure having an inner end positioned generally below said discharge opening and extending generally outwardly over the other end of said movable mounting structure and including a continuous type conveyor means thereon, said boom frame being pivotable at its inner end about a vertical axis for swinging said boom frame and conveyor from side to side of said machine and also pivotable about a horizontal axis for raising and lowering the outer end of said boom from and conveyor, (d) a boom hopper means located at the outer end of said boom frame beneath the end of said conveyor belt, and (e) a remotely controllable discharge chute means movably attached to the lower portion of said boom hopper means for receiving concrete therefrom, said discharge chute being movable in a generally horizontal circular path around said lower portion of said boom hopper means and also being movable in a vertical plane for changing its angle of incline.

2. A concrete transporting and placing machine, comprising: (a) a controllable mobile mounting structure including a power plant, (1)) a mixer means mounted at one end of said structure, said mixer means having a discharge opening and a gate means for opening and closing said discharge opening, said mixer including a generally downwardly inclined mixer chute means below said discharge opening and said gate means for receiving concrete, (0)

an elongated boom frame structure having an inner end positioned generally below said mixer chute means and extending generally outwardly and including a continuous type conveyor means extending from said inner end to the outer end, said boom frame being pivotable at its inner end about a vertical axis for swinging said boom frame and conveyor from side to siderof said machine 7 V and also pivotable about a horizontal axis for raising and :lowering the outer end of said boom frame and conveyor, ((1) a boom hopper means located at the outer end of slidable track means to the lower portion of said boom hopper means for receiving concrete therefrom, said discharge chute being movable in a generally horizontal circular path around said track means of said boom hopper means and also being movable in a vertical plane for changing its angle of incline.

3. A concrete transporting and placing machine, comprising: (a) a controllable mobile mounting structure including a power plant, (b) a mixer means generally open on its upper side mounted at one end of said structure, said hopper means having a discharge opening and a gate means for opening and closing said discharge opening, said mixer including a generally downwardly inclined mixer chute means below said discharge opening for receiving concrete, (0) an elongated boom frame structure having an inner end positioned generally below said mixer chute means and extending generally outwardly and upwardly and including a continuous type conveyor means supported on a plurality of stationary rollers mounted on said boom frame, said boom frame being pivotable at its inner end about a vertical axis for swinging said boom frame and conveyor fromside to side of said machine and also pivotable about a horizontal axis for raising and lowering the outer end of said boom frame and conveyor, (d) a boom hopper means,

located at the outer end of said boom frame beneath the end of said conveyor means, and (e) a discharge chute means movably attached by a slidable track means to the lower portion of said boom hopper means for receiving concrete therefrom, said discharge chute being movable in a generally horizontal circular path around said lower portion of said boom hopper means and also being movable in a vertical plane for changing its angle of incline.

4. A concrete transporting and placing machine, comprising: (a) a controllable mobile chassis mounting structure including a power plant, (b) a mixer means generally open on its upper side and located at one end of said chassis structure, said mixer means having an outer end and a smaller inner end with said inner end being provided with a discharge opening and a gate means for opening and closing said discharge opening, said mixer means being tiltable about a generally horizontal axis located near its inner end, and said hopper means including a generally downwardly inclined mixer chute means below said discharge opening for receiving concrete mix, an elongated boom frame structure having a mixer end positioned generally below said mixer chute means and extending generally outwardly and upwardly and supporting a roller mounted continuous type conveyor means thereon, said conveyor means extending from said mixer end to the outer end of said boom frame, said boom frame being universally mounted at its mixer end to permit its outer end to swing from side to side and to be raised and lowered, (d) a boom hopper means located at the outer end of said boom frame and positioned beneath the end of said conveyor means, and (e) a generally downwardly inclined discharge chute means movably mounted on and extending below said boom hopper means by a slidable track means for rotattion about a generally vertical axis, said discharge chute means also being pivotally mounted for movement in a vertical plane for changing its angle of incline.

5. A concrete transporting and placing machine, comprising: (a) a controllable mobile chassis structure including a power plant thereon, (b) a mixer means located at one end of said chassis structure, said mixer means having an outer end and a discharge end with said discharge end being provided with a discharge opening, said mixer means being tiltable about a generally horizontal axis located near its discharge end, and said mixer means including a generally downwardly inclined mixer chute means below said discharge opening for receiving concrete mix, (0) an elongated boom frame structure having a mixer end positioned generally below said mixer chute means and extending generally forwardly outwardly and upwardly and supporting a roller mounted continuous type conveyor means thereon, said conveyor means extending from said mixer end to the outer end of said boom frame, said boom frame being universally mounted at its mixer end for swinging from side to side and for being raised and lowered, (d) a boom hopper means located at the outer end of said boom frame and positioned beneath the end of said conveyor means, and (e) a generally downwardly inclined discharge chute means movably mounted on and extending below said boom hopper means by a track means for rotation about a generally vertical axis, said discharge chute means also being pivotally mounted for movement in a vertical plane for changing its angle of incline.

6. A concrete transporting and placing machine, comprising: (a) a controllable mobile chassis structure including a power plant thereon, (b) a mixer means generally open on its upper side and located on said chassis structure, said mixer means having an outer end and a smaller inner end with said inner end being provided with a discharge opening and a gate means for opening and closing said discharge opening, said mixer means being tiltable about a generally horizontal axis located near its inner end, (0) an elongated boom frame structure having a hopper end positioned generally below said hopper discharge opening and extending generally forwardly, outwardly and upwardly and supporting a roller mounted continuous type conveyor means thereon, said conveyor means extending from said hopper end to the outer end of said boom frame, said boom frame being universally mounted at its hopper end for swinging from side to side and for being raised and lowered, (d) boom hopper means located at the outer end of said boom frame and positioned beneath the end of said conveyor means, and (e) a generally downwardly inclined discharge chute means movably mounted on a track means and extending below said boom hopper means for rotation about a generally vertical axis, said discharge chute means also being pivotally mounted for movement in a vertical plane for changing its angle of incline.

7. A concrete transporting and placing machine, comprising: (a) a mobile mounting structure including a 7 8 power plant, ([2) a mixer mean mounted at one end of said structure, said mixer means having discharge means for discharging concrete mix from said mixer, (c) an elongated boom frame structure having an inner end positioned generally below said discharge opening and extending generally outwardly and including a continuous type conveyor means thereon, said boom frame being pivotable at its inner end about a vertical axi for swinging said boom frame and conveyor from side to side of said machine and also pivotable about a horizontal axis for raising and lowering the outer end of said boom frame and conveyor, (d) a boom hopper means located at the outer end of said boom frame beneath the end of said conveyor belt, and (e) a discharge chute means movably attached by a track means to the lower portion of said boom hopper means for receiving concrete therefrom, said discharge chute being movable in a generally horizontal circular path around said track means of said boom hopper means and also being movable in a vertical plane for changing its angle of incline.

8. A concrete transporting and placing machine, comprising: (a) a controllable mobile mounting structure including a power plant, (b) a mixer means mounted at one end of said structure, said mixer means having discharge means for discharging concrete mix from said mixer, (c) an elongated boom frame structure having an inner end positioned generally below said discharge means and extending generallyoutwardly and including a continuous type conveyor means extending from said inner end to the outer end, said boom frame being pivotable at its inner end about a vertical axis for swinging said boom frame and conveyor from side to side of said machine and also pivotable about a horizontal axis for raisin and lowering the outer end of said boom frame and conveyor, (d) a boom hopper means located at the outer end of said boom frame beneath the end of said conveyor belt, and (e) a discharge chute means movably attached by a track means to the lower portion of said boom hopper means for receiving concrete therefrom, said discharge chute being movable in a generally horizontal circular path around said track means of said iboom hopper means and also being movable in a vertical plane for changing its angle of incline.

9. A concrete transporting and placing machine, comprising: (a) a controllable mobile mounting structure including a power plant, (11) mixer means generally open on its upper side mounted at one end of said structure, said mixer means having a discharge opening for discharging concrete mix from said mixer, (c) an elongated boom frame structure having an inner end positioned generally below said discharge opening and extending generally outwardly and upwardly and including a continuous type conveyor means supported on a plurality of stationary rollers mounted on said boom frame, said boom frame being pivotable at its inner end about a vertical axis for swinging said boom frame and conveyor from side to side of said machine and also pivotable about a horizontal axis for raising and lowering the outer end of said boom frame and conveyor, and (d) a discharge chute means movably attached by a track means to the outer end of said boom frame structure for receiving concrete therefrom, said discharge chute being movable in a generally horizontal circular path below the outer end of said conveyor and also being movable in a vertical plane for changing its angle of incline.

10. A concrete transporting and placing machine, comprising: (a) a controllable mobile chassis structure including a power plant thereon, (b) a mixer means locat-ed at one end of said chassis structure, said mixer means having an opening and discharge means for discharging concrete mix from said mixer through said discharge opening, (c) and elongated boom frame structure having a mixer end positioned generally below said mixer discharge opening and extending generally outwardly and upwardly and supporting a roller mounted continuous type conveyor means thereon, said conveyor means extending from said mixer end to the outer end of said boom frame, said boom frame being universally mounted at its mixer end to permit its outer end to swing from side to side and to be raised and lowered, and (d) a generally downwardly inclined discharge chu-te means movably mounted on a generally circular track mean-s and extending below said boom frame structure for rotation about a generally vertical axis, said discharge chute mean also being pivotally mounted for movement in a vertical plane for changing its angle of incline.

11. A concrete transporting and placing machine, com

, prising: (a) a mobile mounting structure including a power plant, ([1) a mixer meansmounted at one end of said structure, said'mixer means having an inner and an outer end and also having a discharge openiug at its inner end and a gatemeans for opening and closing said discharge opening, (0) an elongated boom frame structure having an inner end positioned generally below said discharge opening and extending generally outwardly and upwardly over the other end of said mobile mounting structure and including a continuous type conveyor means thereon, said boom frame being pivotable at its inner end about a vertical axis for swinging said boom frame and conveyor from side to side of said machine and also i pivotable about a horizontal axis for raising and lowering the outer end of said boom frame and conveyor, (d)

References Cited by the Examiner UNITED STATES PATENTS 961,601 6/ 10 Freeman 193-16 1,935,922 11/33 Stepan-ian 259169 2,017,439 10/35 Grayson 259-169 2,880,977 4/59 Maxon 259--172 CHARLES A. WILLMUTH, Primary Examiner. 

1. A CONCRETE TRANSPORTING AND PLACING MACHINE, COMPRISING: (A) A MOBILE MOUNTING STRUCTURE INCLUDING A POWER PLANT, (B) A MIXER MEANS MOUNTED AT ONE END OF SAID STRUCTURE, SAID MIXER MEANS HAVING A DISCHARGE OPENING AT ITS INNER END AND A GATE MEANS FOR OPENING AND CLOSING SAID DISCHARGE OPENING, (C) A SWINGABLE AND REMOTELY CONTROLLED ELONGATED BOOM FRAME STRUCTURE HAVING AN INNER END POSITIONED GENERALLY BELOW SAID DISCHARGE OPENING AND EXTENDING GENERALLY OUTWARDLY OVER THE OTHER END OF SAID MOVABLE MOUNTING STRUCTURE AND INCLUDING A CONTINUOUS TYPE CONVEYOR MEANS THEREON, SAID BOOM FRAME BEING PIVOTABLE AT ITS INNER END ABOUT A VERTICAL AXIS FOR SWINGING SAID BOOM FRAME AND CONVEYOR FROM SIDE TO SIDE OF SAID MACHINE AND ALSO PIVOTABLE ABOUT A HORIZONTAL AXIS FOR RAISING AND LOWERING THE OUTER END OF SAID BOOM FROM AND CONVEYOR, (D) A BOOM HOPPER MEANS LOCATED AT THE OUTER END OF SAID BOOM FRAME BENEATH THE END OF SAID CONVEYOR BELT, AND (E) A RE- 